22. What is the primary function of the periosteum? A. Cushioning joints B. Covering articular surfaces C. Nourishing bones Now rishing D. Producing red blood cells E Storing fat 23. The term "cranial"is synonymous with which directional term? A. Inferior B. Superior C Anterior D. Posterior E. Lateral 24.Which bone type is characterized by its ability to reduce friction and protect tendons? A. Long Bones B. Short Bones C. Flat Bones D. Irregular Bones E. Sesamoid Bones 25. The thoracic cavity is separated from the abdominopelvic cavity by which structure? A. Peritoneum B. Pleura C. Diaphragm D Rib Cage E. Mediastinum 26. Which movement involves turning the palm of the hand downward? A. Supination B. Pronation C. Rotation D. Circumduction E. Protraction

## Step1<br />For question 22, we need to identify the primary function of the periosteum. The periosteum is a membrane that covers the outer surface of all bones, except for the joints of long bones. Its primary function is to nourish the bone.<br /><br />## Step2<br />For question 23, we need to find the term that is synonymous with "cranial". The term "cranial" refers to the skull or cranium, which is the part of the skeleton that encloses the brain. The term "superior" is synonymous with "cranial" as it refers to a position above or higher than another.<br /><br />## Step3<br />For question 24, we need to identify the type of bone that is characterized by its ability to reduce friction and protect tendons. Sesamoid bones are small, round bones that are embedded in tendons and are characterized by their ability to reduce friction and protect tendons.<br /><br />## Step4<br />For question 25, we need to identify the structure that separates the thoracic cavity from the abdominopelvic cavity. The diaphragm is a muscular partition separating the thoracic cavity from the abdominopelvic cavity. It plays a crucial role in respiration by contracting and relaxing to allow air into and out of the lungs.<br /><br />## Step5<br />For question 26, we need to identify the movement that involves turning the palm of the hand downward. Pronation is the movement that involves turning the palm of the hand downward or posteriorly. It is the opposite of supination, which is the movement that turns the palm upward or anteriorly.